Pulley-ventilating means



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Patented Oct. 2l, 1924u UNITEDV STATES FATNT l AUSTIN KIMBLE, OF WAUSAU,WISCONSIN, ASSIGIHIQR TD MAIELATHON ELECTRIC MFG.

CO., OF WAUSAU, WISCONSIN, A CORPORAl-CN F WISCONSIN.

PULLEYVENTILATING MEANS.

Application filed March 6, 1922. Serial No. 541,550.

T 0 all whom t may concern Be it known that I, AUSTIN KIMBLE, a citizenof the United States of America, and a resident of lausau, county ofMarathon,

and State of Wisconsin, have invented a new and useful Improvement inPulley-Ventilating Means, of which the following is a specication.

This invention relates to belted pulleys and means for Ventilating sameso as to avoid excessive heating especially when subjected to overloador slippage. In certain kinds of service it is desirable to provide forspeed regulation and maximum load control by means of belt slippage inwhich case it is highly desirable to provide special or artificial meansto prevent heating.

The main objects of this invention are to provide improved means forcooling a pulley by artiiicially produced air circulation; to provide asystem of motor driven belt connected machines with a common source ofcooling draft for the pulleys which are subject to overload slippage;and to provide in combination with a pulley having heat conductivespider or core, an extraneous source of cooling draft.

Referring to the drawings Figure 1 is a conventional diagram showing aplurality of motor driven belt connected machines in plan, incombination with a blower shown in side elevation with connecting meanstherefor to distribute draft to the several motor pulleys.

Figure 2 is a greatly enlarged end view of the slippage pulley which inthis instance is mounted on the motor.

Figure 3 is an axial section on the line 3-3 of Figure 2c Figure 4 is aslightly enlarged view of one of the motors as viewed on the line 4*/1of Figure 1 and shows also the belt tension adjusting meanse Figure 5shows a modification= Referring to said drawings, the several motordriven machines 1, which may be printing presses for instance, aredriven by motors 2 respectively which are connected to the severalmachines by belts 3 riding on the motor pulleys 4 and machine pulleys 5.

In order to provide for ready manual adjustment of the belt tension fromtime to time each pulley 2 is mounted on a leverage support 6 which isprovided with a horizontal pivotal support 7 on the stationary frame 8.The lever 6 is adapted to receive the motor on an upwardly projectingarm 6 and the other` arm 6 is provided with an adjusting screw 9 havingthreaded engagement with an upwardly projecting bracket 8 on said frame8. A compression spring 10 is disposed between the lever arm 6 and thethreaded end of said bracket 8 and the lower end of said screw isprovided with a head 9 to retain the end of lever arm 6".

Each pulley l is provided with a ventilator 11, disposed in axialalinement with an air supplying nozzle 12. The several nozzles arearranged as branches of a common air conduit 13 which communicates witha source of draft pressure, as for instance a blower 14.

lilach pulley lcomprises a hub 15 adapted to receive the` motor shaft 16whereon it is coturnably secured by key 16, a rim 17 and the ventilatingmember 11. Said member 11 is of unitary character and is preferably inthe form of a brass casting and comprises a pair of concentric cylindersi8 and 19 space-d apart by a series of radially disposed longitudinallypositioned web members or plates 2O adapted to present a large heatradiating surface to the ventilating draft which is discharged throughsaid ventilator.

Referring to the modiiication shown in Fig. 5 the draft is reversed.Here the fan 21, is provided with a suction intake con duit 22 leadingfrom the pulley 4t to the center of the fan, whereby air is drawnthrough the pulley and into the fan,

Although but two specific embodiments of this invention are herein shownand described, it will be understood that numerous details of theconstruction shown may be altered or omitted without departing from thespirit of this invention as defined by t-he following claims.

I claim:

1. A power plant comprising a plurality` of motor driven belt connectedmachines arranged and adapted for slippage at the motor pulleys atpredetermined loads, in combination with a source of draft pressure anddistributingnozzles arranged to discharge air endwise through theseveral slippage pulleys.

2. In combination a plurality of independently belted pulleys, eachadapted and arranged to carry a belt load subject to heat generatingslippage, and each adapted to admit a draft endwise therethrough incombination With a Common cooling device comprising a fluid propellingmeans, and a system of fluid Carrying conduits connected thereto andcommunicating endwise with said pulleys respectively in eiiectirerolation thereto for producing a draft there 10 through from end to end.

Signed at Chicago this 27th day of Fehruary, 1922.

AUSTIN KIMBLE.

